Originally published February 8 2006
Walking study determines three walks a week protects against artery disease
by Mike Adams, the Health Ranger, NaturalNews Editor
Mary McGrae McDermott, M.D., associate professor of medicine at the Feinberg School, led a study that found walking three times a week can stunt the development of peripheral artery disease, which results in the impairment of blood flow.
A study in the Jan. 3 issue of the Annals of Internal Medicine shows that walking three times a week, even in an unsupervised exercise program, can significantly improve walking ability and slow progression of peripheral artery disease (PAD).
The study of 417 men and women, conducted by researchers at Northwestern University Feinberg School of Medicine, indicates that those who walked for exercise three or more times per week had a significantly smaller average annual decline in walking distance and speed than those who walked one to two times per week.
The study was led by Mary McGrae McDermott, M.D., associate professor of medicine, division of general internal medicine, at the Feinberg School.
The researchers also found that only a small proportion of African-American study participants walked for exercise three or more times per week.
Previous studies have shown that African-American patients with PAD have greater functional impairment than white patients.
Research has shown that PAD tends to worsen over time, but participation in regular physical rehabilitation programs that include supervised treadmill walking at least three times a week has been shown to improve walking performance and slow the progression of the disease.
Besides showing that self-directed walking for exercise at least three times a week slowed decline in ability to perform physical activities, the study found that participants with the worst PAD at the start of the study were the ones most likely to benefit from a regular self-directed walking program.
McDermott's collaborators on this study were from Northwestern University Feinberg School of Medicine; Evanston Northwestern Healthcare; the National Institute on Aging; and the University of California-San Diego.
The study was supported by grants from the National Heart, Lung, and Blood Institute (grant numbers R01-HL58099 and R01-HL64739) and by the National Center for Research Resources, National Institutes of Health (grant number RR-00048).
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